Automation System
What is the difference between integral and derivative control?

None of these
derivative control responds to a change in the rate of change in the error signal
All of these
integral control has slower response to an error signal.
derivative control does not eliminate offset error

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Automation System
If the transient response is under damped:

the value of the output will exceed the value of the input at times during the transient period
the present overshoot is zero
both a and b
steady-state will be reached faster than if the system is overdamped
None of these

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Automation System
D/A (digital to analog) conversion:

must be fed through a filter to reproduce the original signal accurately
both (b) and (c)
has to be sampled at 1/2 the highest input frequency
results in a binary code as the final output
None of these

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Automation System
What is proportional control?

All of these
The gain is independent of offset error.
It has a discrete output for each error value
The controller output varies continuously over a range
None of these

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Automation System
A venturi tube:

None of these
measures the presence of a liquid
can be used to measure gas or liquid flow rates
is extremely difficult to use
is made only of metal

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